Anvil-knife.



R.,F. LOVEJOY & G. D. ALEXIS.

ANVIL KNIFE. fPPLlcArlo'u FILED FEB. 4, 1913.

1,298,526. Patented Mar. 25,1919.

WITNESS:

ATTDORNEY.

' Tn s'rans PATENT, OFFICE.

BUY 1. LUVEJOY, OF LOWELL, MASSACHUSETTS, AND GEORGE I). ALEXIS, OF NEW ORLEANS, LOUISIANA.

ANVIL-KNIFE.

To all whomc't may concern:

' Be it known that we, Roy F. LovEJor, a citizenof the United States, residing at Lowell, in the county of Middlesexand State of Massachusetts, and Gnonon D. mine, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Anvil-Knives, of which the following is a specification.

This invention relates to anvil knives for use with what are known as sawmill hogs. Such hogs are used for cutting refuse lumber into chips.

In the type of machine for which our knifeis peculiarlyv adapted, there is a V- shaped anvil having sides which come together and a relatively flat top. To the faces or sides of such an anvil, there are fastenedanvil knives which are substantially rectangular in shape. edge of one of the long sides is at substantially right angles with the face of the knife and is used in association with a revolving disk or cutter as a cutting edge.

The cutting is usually greatest at the part of the edge which is nearest the point of the V for the reason that the anvil points downwardly and the wood naturally falls toward the bottom. This causes one end to wear out quicker than the otherend, and when this wears out, the knife must be replaced by a new one even if the other end is substantially unworn.

At the point of the V, the short end or I edge of the rectangular knife is cut at an oblique angle to fit the corresponding edge of the other knife so that chips will not get in'between and wedge them apart. To make a tight joint, it is desirable that there should be some mean of longitudinal adjustment.

I Our invention is for the purpose of providing a reversible anvil knife which, instead of having one cutting edge, will have .four and which can be properly adjusted in any one of four positions.

Specification of Letters Patent.

The front or outer- Patented Mar. 25, 1919.

Application filed February 4, 1918. Serial No. 215,355.

n the drawings, A represents a well known V-shaped type of anvil for hog machines having side faces 10 and 11 an bolt holes 12, together with a front edge 13. K represents one of the knives which c0- operate with the substantially rigid anvil knives, such as B and O.

In Fig. 1, we show knives such as B and 0 each of which is substantially rectangular and has cuttin edges 20 and 21, which are at substantially right angles with the face 22 of the knife and each of which has fitting edges, such as 23, 24, 25, and 26, which are beveled off so as to extend back at equal oppositely disposed oblique angles togar5d each other, as shown clearly at 24 an 2 A In each knife, we counterbore or countersink recesses such as 30 to receive the heads 10 ofbolts such as 41 and from these is cesses we bore bolt holes 31 throu h the knife in such positions that they wil register with holes 12 in the anvil.

In the above construction, it will be noted that there is a space between the fitting edges 23 and 24 which cannot be closed up because no means of adjustment is provided.

However, if. holes 12 and .31 are bored at exactly the right positions, on both sides other. In this manner, we provide four .cutting edges-and as there are two fitting edges, both beveled at oblique angles in the same way, we getfa great deal more wear out of a knife such as B or C than from those now in use.

In Fig. 2 weshow our preferred form of knife F. This knife hasfit ting edges 60 and 61 at the short ends of the rectangle and these are beveled at acute angles from the face toward the back of the knife, as

shown.

The long sides 50. and 53 of the rectangle form at their face edges the cutting edges of the knife and these are preferably specially hardened at 51, 52, 54, and 55 by any well known'means or by the insertion of strips of hardened steel, as shown. It is not necessary that the hardeningshould extend the length offeach edge.

For the purpose of adjustment, we form an oval shaped recess 62 in the face of the knife and from this recess through the.

thing getting in between.

Another advantage of such slots is that when the knife is turned end for end, all of the bolt holes 12 will easily registe. .th them and our knife can thus beused with an anvil in which the bolt' holes are not specially bored to fit it.

In Fi 3 we show a knife G which has oblique ttin edges 70 and 71, cutting edges 72 and 73, w iich' are hardened their entire length at 76 and 77. We also show a recess 74 and one long longitudinal slot 7 5 instead of a plurality of bolt slots such as 63.

Such anvil knives are usually slightly curved, as shown, and we preferto makethe body of our knife from relativelysoft steel and to cut a groove or grooves in each long face edge into which we insert a strip of tool steel which is then welded into lace. We can, however, make the entire knife of tool steel if desired.

We claim:

1. A substantially rigidreversible and adjustable anvil knife of substantially rectangular form having relatively long parallel cutting edges at substantially right angles with the face of the knife, the part proximate each end of each edge being of hardened metal, and relatively. short fitting edges at equal oppositelvdisposed oblique angles with said face, a longitudinal bolt head recess in the face and on or more longitudinal slots which, from su recess, pass through the knife.

.head recess inthe face and one or more longitudinal slots which, from such recess, pass through the knife.

3. An anvil knifeof substantially rectangular form having parallel cutting edges at substantially'right angles with the face of the knife and fitting edges at obliqueangles with said face, and one or more longitudinal slots which, from such face, pass through the'knife. I

4. An anvil knife of substantially rectangular form having parallel cutting edges at substantially'right angles with the face .of the knife and fitting edges at oblique angles with said face.

5. A substantially rigid anvil knife of substantially rectangular form having relatively long parallel hardened cutting edges at substantially right angles with the face of the knife and relatively short fitting edges at equal oppositely disposed oblique angles 'withsaid face, and one or more longitudinal slots which, from such face, pass through the knife parallel with-the cutting edges.

6. An anvil knife' of substantially rectangular form having parallel cutting edges at substantially right angles with the'face of the knife and fitting edges at equal op positely disposed oblique angles with said face.

. 7 In a machine of the character described,

the combination with a V-shaped anvil block, of diverging knives each. of substantially rectangular form having parallel cutting disposed oblique angles with said face, and I one ormore longitudinal slots parallel with and midway between the cutting edges, to-

gether with bolts which pass through the 1 slots of each anvil knife and through the anvll whereby the fitting edges thereof may be adjusted.

8. In a machine of the character described,

I the combination with a (shaped anvil block,

of two diverging substantially rigid anvil knives each of substantially rectangular form and each having relatively long pargles with the face of the knife and relatively short fitting edges at equal oppositely dis whereby the saidknivcs may be adjusteo,

allel cutt ng edges at substantlally right anlongitudinally parallel with the cutting edges and fitting edges at equal oppositely edges. disposed oblique angles with the face of the 9. In a machine of the character described, knife. -10 the combination with a V-shaped anvil block, In testimony whereof We hereunto afiix 5 of diverging reversible anvil knives attached our signatures.

thereto, each knife being of substantially ROY F. LOVEJOY. rectangular form having parallel cutting G. D. ALEXIS. 

